Well-sinterable Y3Al5O12 powder from carbonate precursor

Ji Guang Li, Takayasu Ikegami, Jong Heun Lee, Toshiyuki Mori

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)

Abstract

Carbonate precursors of Y3Al5O12 (YAG) were synthesized from a mixed solution of alum and yttrium nitrate using ammonium hydrogen carbonate as precipitant. Precipitation method (normal-strike or reverse-strike) and aging were found to have dramatic effects on cation homogeneity of the precursor, which in turn influenced the formation temperature of the YAG phase. Reactive YAG powders were produced from the reverse-strike-derived, as-synthesized precursors at temperatures ≤ 1200 °C. These powders densified to >98.0% of the theoretical density up to 1500 °C at a constant heating rate of 8 °C/min or to transparency by vacuum sintering at 1700 °C for 1 h without additives.

Original languageEnglish
Pages (from-to)1514-1523
Number of pages10
JournalJournal of Materials Research
Volume15
Issue number7
DOIs
Publication statusPublished - 2000 Jul
Externally publishedYes

Bibliographical note

Funding Information:
One of the authors (J-G.L.) expresses his thanks to Japan International Science and Technology Exchange Center and Japan Science and Technology Corporation for granting a Science and Technology Agency fellowship. Special thanks are due to Dr. Tadao Sato for DTA/ TG measurements and to Dr. Yoshiyuki Yajima for chemical analysis.

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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